How to generate date series to occupy absent dates in google BiqQuery?

Question

I am trying to get daily sum of sales from a google big-query table. I used following code for that.

select Day(InvoiceDate) date, Sum(InvoiceAmount) sales f         


        

Answer 1

For Standard SQL

WITH

splitted AS (
  SELECT
    *
  FROM
    UNNEST( SPLIT(RPAD('',
          1 + DATE_DIFF(CURRENT_DATE(), DATE("2015-06-01"), DAY),
          '.'),''))),
  with_row_numbers AS (
  SELECT
    ROW_NUMBER() OVER() AS pos,
    *
  FROM
    splitted),
  calendar_day AS (
  SELECT
    DATE_ADD(DATE("2015-06-01"), INTERVAL (pos - 1) DAY) AS day
  FROM
    with_row_numbers)
SELECT
  *
FROM
  calendar_day
ORDER BY
  day DESC